1249725126 has 16 divisors (see below), whose sum is σ = 2691715824. Its totient is φ = 384530784.

The previous prime is 1249725121. The next prime is 1249725137. The reversal of 1249725126 is 6215279421.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249725121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8010981 + ... + 8011136.

It is an arithmetic number, because the mean of its divisors is an integer number (168232239).

Almost surely, 2^1249725126 is an apocalyptic number.

1249725126 is an abundant number, since it is smaller than the sum of its proper divisors (1441990698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1249725126 is a wasteful number, since it uses less digits than its factorization.

1249725126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16022135.

The product of its digits is 60480, while the sum is 39.

The square root of 1249725126 is about 35351.4515402126. The cubic root of 1249725126 is about 1077.1383794834.

The spelling of 1249725126 in words is "one billion, two hundred forty-nine million, seven hundred twenty-five thousand, one hundred twenty-six".